I don't think flanking will work. Panzer IV's are too squishy vs double jacksons, especially in team games. Riflemen screening with snares to nail your tanks and supporting infantry gets annihilated by the double scotts. Panthers have too low rate of fire to do any meaning damage and will get nailed by the kiting jacksons.
The combo is very very potent, but only seen in really late game stages. I believe there was once a same kind of strat, but the double scotts were replaced by paratroopers with double lmgs and you had multiple jacksons behind the blob and supported by p47 galore. Same sort of melt all strat.
I'm talking about 1vs1
Dual Scott cost 160 fuel and 20 popcast, that's one Jackson less on the field. I repeat myself but the solution is overwhelming him with armor.
And of course you're not sending your panther and panzer alone, you have your own infantry to provide support, scouting and AI damage.
The real problem with Scott is that the unit is cheap enough to be quickly replaced and don't really care about infantry vet to deal damage. Vet0 Scott is going to hurt you the same way and grind its own vet vs vet0 or vet3 grens.